2013 Mac Pro FYI: The Late 2013 Mac Pro's CPU can be Upgraded - it's still socketed and as of early 2014, it's been confirmed the CPU can be upgraded. (Page updated with info on more DIY 2013 Mac Pro CPU upgrades, benchmarks, compatible Xeon CPUs and a Video with step-by-step guide on how to replace the CPU in a Late 2013 Mac Pro.)